Merge pull request #517 from ant-media/addPaginationMechanism

Add mechanism to get subtrack count

src/main/js/webrtc_adaptor.js

@@ -878,6 +878,22 @@ export class WebRTCAdaptor {
 		this.webSocketAdaptor.send(JSON.stringify(jsCmd));
 	}
 
+	/**
+	 * Called to get the subtrack count for a specific maintrack. AMS responds with the subtrackCount callback.
+	 * @param {string} streamId : main track id
+	 * @param {string} role : filter the subtracks with the role
+	 * @param {string} status : filter the subtracks with the status
+	 */
+	getSubtrackCount(streamId, role, status) {
+		let jsCmd = {
+			command: "getSubtracksCount",
+			streamId: streamId,
+			role: role,
+			status: status,
+		};
+		this.webSocketAdaptor.send(JSON.stringify(jsCmd));
+	}
+
 	/**
 	 * Called to enable/disable data flow from the AMS for a specific track under a main track.
 	 * Parameters:

src/test/js/webrtc_adaptor.test.js

@@ -2026,6 +2026,34 @@ describe("WebRTCAdaptor", function() {
 
 	});
 
+	it("getSubtrackCount", async function() {
+
+		let adaptor = new WebRTCAdaptor({
+			websocketURL: "ws://example.com",
+			isPlayMode: true
+		});
+
+		let streamId = "roomId";
+		let role = "host";
+		let status = "active";
+
+		let jsCmd = {
+			command: "getSubtracksCount",
+			streamId: streamId,
+			role: role,
+			status: status,
+		};
+
+		let webSocketAdaptor = sinon.mock(adaptor.webSocketAdaptor);
+
+		let sendExpectation = webSocketAdaptor.expects("send").once().withArgs(JSON.stringify(jsCmd));
+
+		adaptor.getSubtrackCount(streamId, role, status);
+
+		sendExpectation.verify()
+
+	});
+
 
 
 });